realm-java: Cannot be cast to io.realm.FooRealmProxyInterface

Goal

Simply load data, I’m using Kotlin 1.0.4 and minifyEnabled

Result

ClassCastException when it tries to do a query.

Steps & Code to Reproduce

It happens randomly, the code sample is below.

Code Sample

fun insertOrUpdate(taskQueue: TaskQueue?, realm: Realm?) {
  try {
    realm?.run {
      executeTransaction {
        taskQueue?.let {
          insertOrUpdate(it)
        }
      }
    }
  } catch (e: Exception) {
    if (DEBUG_ENABLED) {
      e.printStackTrace()
    }
    Crashlytics.logException(e)
  }
}

open class TaskQueue(
    @PrimaryKey var id: String,
    var layers: RealmList<Layer> = RealmList()):
    RealmObject(), Parcelable {

  companion object {
    @JvmField val CREATOR = object : Parcelable.Creator<TaskQueue> {
      override fun createFromParcel(source: Parcel) = TaskQueue(source)
      override fun newArray(size: Int): Array<TaskQueue?> = arrayOfNulls(size)
    }
  }
  //...Parcel and more not important
}

Version of Realm and tooling

Realm version(s): 2.2.1 Realm sync feature enabled: No Android Studio version: 2.1.2 / gradle-2.14.1 Which Android version and device: 6.0 - LG G2